Antenna



Jlll1e121951 A J. CRETELLA 2,556,839

`ANTENNA Filed April 26, 1949 INVENTOR. y

Patented June 12,1951

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ANTENNA Joseph `Cretella, South Ozone Park, N. Y., assigner to Veri-BestTelevision Products, Inc., New York, N. Y., a corporation of New YorkApplication April 26, 1949, Serial No. 89,690

Antenna structures of the dipole class, with or Vwithout reectors,usually comprise one or more pairs of elongated metal members, carriedinsulated on a frame. Usually such metal members are of aluminum tubingformed with flattened ends. Both members of any pair, are required to bein alignment.

f It is the principal object of this invention to provide a novel andimproved construction for antennas of the character mentioned, affordingeasy and secure assembly of all its parts, meaning of said metal memberswhich are called the lconductors, onto the frame.

A further object hereof is to provide a construction for antennas of theclass described, having novel and improved joint structure to insureautomatic axial alignment of a pair of related conductors.

Another object hereof is to provide a novel and improved knock-down typeantenna of the class set forth, whose parts may be packaged and.shippedv as Va compact single bundle, and which parts are easy andreasonably cheap to manufacture, simple to assemble, and when erected,produce an antenna which is eicient in carrying out the purposes forwhich it is designed.

Other objects and advantages will become apparent as this disclosureproceeds.

In the accompanying drawings forming part of this specification, similarcharacters of reference indicate corresponding parts in all the views.

Fig. 1 is a top plan view of a dipole antenna having reflectorconductors and the conductors of said dipole, joined to the frame memberin accordance with the teachings of this invention.

Fig. 2 is the front View of what Fig. 1 is the top view.

Fig. 3 is an enlarged fragmentary view showing one construction ofconductor being mounted onto the frame member.

Fig. 4 is an enlarged framentary view showing a. conductor of modifiedconstruction mounted on the frame member.

Fig. 5 is a perspective view of a frame piece adapted to be clamped to apole.

Fig. 6 is a perspective view of a slat of insulative material, two ofwhich are included in the device shown, and used for mounting theconductors to accomplish an erected antenna structure as in Fig. 1.

In the drawings, the numeral I5 designates 1 Claim. (Cl. Z50-33)generally an antenna, whose conductors are designated by the numerals I6and I1. The reflector conductors are I8 and I9. 'I'hese four conductorsare separate parts which are mounted in identical fashion on an H-shapedframe. The cross-piece of this frame is denoted by the numeral 20. Thelegs of said frame are the slats 2| and 22, of insulative material. Eachslat carries a pair of conductors in alignment; said pair of conductorsextending from the slat they are mounted on, in opposite directions, sothat the composite structure is also H-shaped. The cross piece 20 issecured to a pole k23, in any suitable manner, as for instance by meansof a clamp lcomprising a U-shaped rod-piece 24, whose threaded endscarry Wing nuts 25; the arms of piece 24 being positioned through thecross-piece 20.

This cross-piece 20 may be of square, metal tubing. Opposite walls arenotched at each end of said tubular member, as shown at 26 and 28, andsuch walls also are each provided with holes as at 29, for the arms ofthe piece 24. The second pair of opposite walls of cross piece 20,'ateach end, are provided with the holes 21, to receive rivets 30 or screwmeans for securing the slats 2| and 22 to said cross-piece.

The slats 2l and 22 are identical. In mid region, each has a pair ofholes for the rivets 30. At each end, each slat has a pair of holes.`The holes for said rivets are designated by the numeral 3l. The otherholes in said slat are de'- noted in pairs by the numerals 32 and 33respectively. Holes 32 and 33 are in alignment, and each of said holes32 and 33 carries a bolt and wing nut in the embodiment shown. Suchbolts are denoted by the numerals 34 and 35.

All conductors mentioned, are preferably formed with at least one oftheir ends flat or iiattened, at which ends said conductors are to bedetachably mounted onto the slats, all in similar manner. Descriptionfor one shall therefore suilice for all of said conductors.

The conductor as l1, in its at end region, is provided with a pair oflongitudinal slots. The one designated by the numeral 36, has itsentrance at tip end of the conductor; thus forming a bifurcation toystraddle the shank of bolt 34. The second of said slots, indicated bythe numeral 31, has an entrance thereto commencing at the longitudinaledge of said conductor, as indicated by the numeral 31. Distance A ispreferably longer than distance B, so that shank of bolt 34 shall bepositioned a short distance up the slot 36, before the shank of bolt 35is at the entrance 31. It is also preferred that the distance C shallequal the distance B and that the line of said slots shall be parallelto the axis of the conductor; the one chosen for illustration, beingthat designated by the numeral I1. Distance A equals that between thetip end of the conductor I1 and the center line of the entrance 31 ofthe slot 31. Distance B equals that between the a-Xes of the bolts 34and 35. Distance C equals that between the ends of the slots 3S and 31,which are furthest from the mentioned tip end of the conductor I1.

It is evident, that because the holes 32 and 33 are in alignment, a pairof conductors as I6 and I1, when mounted on the insulative Slat 2 I,would be in alignment; it being assumed that the width of the slots 36and 31, and the diameter of the holes 32 and 33, are in slidingtolerance t with the bolts 34 and 35. The assembly is maintained by anysuitable means, as *for Linstance wing nuts shown on said bolts, whichnuts 38 also serve to secure connection leads.

The conductor may be of construction as I1'. In -its fiat end region, itis provided with a pair of longitudinal slots. The one designated by thenumeral 4.6, has its entrance at the tip end of the conductor.; thusforming a bifurcation to straddle the shank of bolt 34. The second slot41 is in the bod-y of the conductor at a position spaced of course fromtip end. Its entrance 41' which is nearest tip end, is enlarged to admitthe -head of the bolt 35. The distance A is preferably longer .thandistance B so vthat the shank of the bolt .34 shall be positioneda shortdistance up the slot 46, before the .head of the bolt 35 is at theentrance i1 of slot 41. width of slots 46 and 41 are in slidingtolerance t with the shanksof bolts 34 and 35. As previously set forth,wing nuts or ,the like on said bolts are used to maintain the assembly.Distance A is that between the tip end of the conductor l1 and ,thecenter of the -entrance 41' ofthe slot 4,1.

It is to be noted that Vthe bolts and their nuts may bershipped mountedon the slats 2| and 22, and it is not necessary vto take them off orapart, in order to mount the conductors.

If desired, in Fig. 3, one of ,the bolts 34, 35 may merely be .a pin .orstud rigidly extending from the slat 2|, and Without head, while in Fig.4, the bolt Y34 may be such a pin without head.

The

This invention is capable of numerous forms and various applicationsWithout departing from the essential features herein disclosed. It istherefore intended and desired that the embodiment shown herein shall bedeemed illustrative and not restrictive and that the patent shall coverall patentable novelty herein set forth;

reference being had to ithegfollowingclaim rather than to the specificdescription herein to indicate the scope of this invention.

I claim:

In an antenna of the character described, the combination of a member ofinsulative material, a 'pair ,of :spaced :opposite shanks extending fromsaid member; at least one of said Shanks having a head, a separateelongated conductor having a pair of .longitudinal slots spaced alongits length in one end region; one of said slots having an entrancecommencing at the tip end of said region; the distance between saidShanks 'being -lessV than the distance -between said 'tip end and the.second slot; the end of the second slot, nearest the tip end mentioned,being of enlarged size to admit the head of the headed -shanktherethrough; the Width of the Viirst lslot and the Width of theremainder of the second slot being adapted to admit said shanks in loosecontact t with the conductor; the conductor being positioned wherebysaid shanks -a-re .through said slots respectively and means on at leastone of the shanks to hold -said vconductor and insulative Ymembertogether, in separable relation.

.JOSEPH rCRETELLA.

REFERENCES. .CITED The following references are of record -in the fileof this patent;

UNITED STATES PATENTS YNumber Name Date 255,781 Graeser Apr. -4, 1882'172,659 Irvine Oct. 18, -1904 .994,720 Coopersmith June Y13, -l-91-12,282,393 Block May =l2, 194-2 .2,299,218 Fener Oct. 20, .-19422,465,331 Resnick Mar. 22, -1949

